The parsec (acronym of “parallax-second”, symbol pc) is a distance unit used in astronomy which is equivalent to 3.26 light years. It’s the distance for which one astronomical unit is viewed under a one arc-second angle.
It pays to be obvious, especially if you have a reputation for subtlety.
A.I. Anticipation Astronomy Award Bit Lit Chess Cyberpunk Cyborg Dark Fantasy Dystopia Extraterrestrial Fantastic Fantasy Foundation FTL Hard Science Heroic Fantasy Horror Hugo I.A. Light Fantasy Locus Marvel Mutant Planet opera Post-apo Robot S.F. Science Science fiction Space Fantasy Space opera Space structure Star Trek Star Wars Steampunk Superhero Superpower Sword and Sorcery Technology Techobabble Three Laws Time travel Uchrony War